From: Jan Hubicka <jh@suse.cz>
Date: Wed, 17 Dec 2008 12:03:04 +0000 (+0100)
Subject: calls.c (expand_call): Do not sibcall if outgoing_reg_parm_stack_space does not match.
X-Git-Tag: releases/gcc-4.4.0~1192
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0e456625276c293c62302c6c4d38d995e2b59880;p=thirdparty%2Fgcc.git

calls.c (expand_call): Do not sibcall if outgoing_reg_parm_stack_space does not match.

	* calls.c (expand_call): Do not sibcall if
	outgoing_reg_parm_stack_space does not match.

Co-Authored-By: Kai Tietz <kai.tietz@onevision.com>

From-SVN: r142792
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 27fd45a409dd..3b263c7df1db 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2008-12-12  Jan Hubicka  <jh@suse.cz>
+	    Kai Tietz <kai.tietz@onevision.com>
+
+	* calls.c (expand_call): Do not sibcall if
+	outgoing_reg_parm_stack_space does not match.
+
 2008-12-12  Anatoly Sokolov  <aesok@post.ru>
 
 	* config/avr/avr.c (avr_mcu_t): Add attiny87, attiny327, at90pwm81,
diff --git a/gcc/calls.c b/gcc/calls.c
index 03994d4ecf53..b94d29800a8d 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -2298,6 +2298,10 @@ expand_call (tree exp, rtx target, int ignore)
 	 It does not seem worth the effort since few optimizable
 	 sibling calls will return a structure.  */
       || structure_value_addr != NULL_RTX
+      /* If outgoing reg parm stack space changes, we can not do sibcall.  */
+      || (OUTGOING_REG_PARM_STACK_SPACE (funtype)
+	  != OUTGOING_REG_PARM_STACK_SPACE (TREE_TYPE (current_function_decl)))
+      || (reg_parm_stack_space != REG_PARM_STACK_SPACE (fndecl))
       /* Check whether the target is able to optimize the call
 	 into a sibcall.  */
       || !targetm.function_ok_for_sibcall (fndecl, exp)